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Byte
Order In
Modbus
Upload Parameter to the GW-7228
After the previous parameter settings, users need to upload the parameters to
the GW-7228.
Modbus Communication
Set J1939 output data
Using the Modbus command as below:
FC16 Write multiple registers (4xxxx) for AO
Example:
In the address 40001, write the value in 0x1234.
[Request Command] (Byte0, Byte1... Byten) (Hex)
01 10 00 00 00 01 02
Data
PGN
Length
(DEC)
Figure 9: J1939 configuration screen
Figure 10: Parameter upload screen
12 34
AB 27(CRC)
ECU's
J1939
Address
Priority
ECU's
J1939
Address
GW-7228 Quick Start v1.2 2011/05
Byte Order
Transm-
In J1939
ission
Data Field
Repetiti-
on
6 6 6 6 / / / / 8 8 8 8
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